Get single user from PeopleEditor and update column of type “People

and Groups”.

Aspx Page:

<%@ Register TagPrefix="wssawc" Namespace="Microsoft.SharePoint.WebControls" Assembly="Microsoft.SharePoint, Version=12.0.0.0, Culture=neutral,

PublicKeyToken=71e9bce111e9429c" %>

<wssawc:peopleeditor id="UserPickerRequestedFor" runat="server" allowempty="False"

height="20px" multiselect="true" selectionset="User" showcreatebuttoninactivedirectoryaccountcreationmode="True"

validatorenabled="True" width="300px"></wssawc:peopleeditor>

Aspx.Cs Page:

PickerEntity UserEntity = new PickerEntity();

int usrCount = UserPicker.Accounts.Count;

for (int i = 0; i < usrCount; i++)

  {

   UserEntity = (PickerEntity)UserPicker.Entities[i];

   string  userAcctName = UserEntity.Description;

   Hashtable peopleEditorData = UserEntity.EntityData;

   string strUserLogin = UserEntity.Key;

   SPSecurity.RunWithElevatedPrivileges(delegate()

   {

   using (SPSite elevatedSite = new SPSite(web.Site.ID))

   {

    elevatedSite.AllowUnsafeUpdates = true;

    SPWeb elevatedWeb = elevatedSite.OpenWeb(web.ID);

    {

       elevatedWeb.AllowUnsafeUpdates = true;

       SPUser user = elevatedWeb.EnsureUser(strUserLogin);

    }

   }

 });

SPUser usrToADD = web.AllUsers[strUserLogin];

reqItem["ReqMgr"] = usrToADD;